On 24-10-2012, at 10:04, pina <pina.gio at hotmail.it> wrote:
> Hi,
>
> I'm Pina and I'm a student in geology. I'm working with
spectral profile of
> sand and I have to find the similarity between one spectral profile
selected
> by hyperspectral image anche one that I created to mix different percentage
> of 4 mineral component. I have to find the best mix of percentage of this 4
> mineral in order to have the best likeness with the spectral profile chose
> by hyperspectral image. Untill now I worked with excel using the function
> equation solver to find the best fit but I 'd like to know if is
possible do
> this operation working in R.
It looks like you need something that can do optimization.
R provides optim() and nlminb().
A similar question was posted several days ago.
See
http://r.789695.n4.nabble.com/Optimization-in-R-similar-to-MS-Excel-Solver-td4646759.html
You might have some use for package limSolve and function lsei.
Also see the CRAN Optimization Task View
(http://cran.r-project.org/web/views/Optimization.html)
Berend
> Thanks for the attention.
> I'm looking forward to hearing from you.
>
> Regards.
>
> Pina.
>
>
>
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